128052821898 has 24 divisors (see below), whose sum is σ = 278471583936. Its totient is φ = 42526765800.

The previous prime is 128052821873. The next prime is 128052821899. The reversal of 128052821898 is 898128250821.

It is a happy number.

128052821898 is a `hidden beast` number, since 1 + 2 + 8 + 0 + 528 + 21 + 8 + 98 = 666.

It is not an unprimeable number, because it can be changed into a prime (128052821899) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13120668 + ... + 13130423.

It is an arithmetic number, because the mean of its divisors is an integer number (11602982664).

Almost surely, 2^128052821898 is an apocalyptic number.

128052821898 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

128052821898 is an abundant number, since it is smaller than the sum of its proper divisors (150418762038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128052821898 is a wasteful number, since it uses less digits than its factorization.

128052821898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26251370 (or 26251367 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 54.

The spelling of 128052821898 in words is "one hundred twenty-eight billion, fifty-two million, eight hundred twenty-one thousand, eight hundred ninety-eight".